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KMM-1050D/1250DHigh-speed Automatic Multi-functional Laminating MachineKMM-1050D/1250DIntroduction KMM-1050/1220D High Speed Laminating Machine, developed and produced collaboratively by Hangzhou Kangdexin and Italian leading laminating machine manufacturer Synergy, is multifunctional and efficient with top technologies. Its Max speed up to 90m/min makes it suitable for mass industrial lamination with various processes and material like OPP, PET and NYLON. Main Features 1. Specially coated cover makes the appearance more pleasant and elegant. High quality feeder guarantees stable and efficient feeding. Servo-controlled overlap is more accurate and stable.
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High accuracy intelligent homothermal heating system guarantees even temperature of heating roller. Automation control system provided by global leading company. Automatic film elevator reduces word load.
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Contack of film and heating roller can be adjusted according to different speed and requirement. More ergonomic designs make the machine more convenient to operate.
A control system is a system, which provides the desired response by controlling the output. The following figure shows the simple block diagram of a control system.Here, the control system is represented by a single block. Since, the output is controlled by varying input, the control system got this name. We will vary this input with some mechanism. In the next section on open loop and closed loop control systems, we will study in detail about the blocks inside the control system and how to vary this input in order to get the desired response.Examples − Traffic lights control system, washing machineTraffic lights control system is an example of control system. Here, a sequence of input signal is applied to this control system and the output is one of the three lights that will be on for some duration of time.
During this time, the other two lights will be off. Based on the traffic study at a particular junction, the on and off times of the lights can be determined. Accordingly, the input signal controls the output.
So, the traffic lights control system operates on time basis. Classification of Control SystemsBased on some parameters, we can classify the control systems into the following ways. Continuous time and Discrete-time Control Systems.Control Systems can be classified as continuous time control systems and discrete time control systems based on the type of the signal used.In continuous time control systems, all the signals are continuous in time. But, in discrete time control systems, there exists one or more discrete time signals.SISO and MIMO Control Systems.Control Systems can be classified as SISO control systems and MIMO control systems based on the number of inputs and outputs present.SISO (Single Input and Single Output) control systems have one input and one output. Whereas, MIMO (Multiple Inputs and Multiple Outputs) control systems have more than one input and more than one output.Open Loop and Closed Loop Control SystemsControl Systems can be classified as open loop control systems and closed loop control systems based on the feedback path.In open loop control systems, output is not fed-back to the input. So, the control action is independent of the desired output.The following figure shows the block diagram of the open loop control system.Here, an input is applied to a controller and it produces an actuating signal or controlling signal. This signal is given as an input to a plant or process which is to be controlled.
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So, the plant produces an output, which is controlled. The traffic lights control system which we discussed earlier is an example of an open loop control system.In closed loop control systems, output is fed back to the input. So, the control action is dependent on the desired output.The following figure shows the block diagram of negative feedback closed loop control system.The error detector produces an error signal, which is the difference between the input and the feedback signal.
This feedback signal is obtained from the block (feedback elements) by considering the output of the overall system as an input to this block. Instead of the direct input, the error signal is applied as an input to a controller.So, the controller produces an actuating signal which controls the plant. In this combination, the output of the control system is adjusted automatically till we get the desired response. Hence, the closed loop control systems are also called the automatic control systems. Traffic lights control system having sensor at the input is an example of a closed loop control system.The differences between the open loop and the closed loop control systems are mentioned in the following table. Open Loop Control SystemsClosed Loop Control SystemsControl action is independent of the desired output.Control action is dependent of the desired output.Feedback path is not present.Feedback path is present.These are also called as non-feedback control systems.These are also called as feedback control systems.Easy to design.Difficult to design.These are economical.These are costlier.Inaccurate.Accurate.